HCPCS code Q4181: Wound product2026 Medicare rate & RVUs in Washington
Reports Amnio Wound supplied for wound coverage, measured by square centimeter and billed with a primary procedure for the wound service.
Medicare pays $134.00–$156.14 for Q4181 in the office in Washington, from Rest Of Washington to Seattle (King Cnty). Which amount applies depends on the service address.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
On this page 9 sections
What Q4181 covers
Q4181 identifies Amnio Wound, a tissue-based product supplied for placement over a wound. Wound-care clinicians, surgeons, and podiatrists may use it when treating wounds such as diabetic foot or venous leg ulcers. The code represents the product quantity, not the wound assessment or the work of placing the material.
Report the number of square centimeters of Amnio Wound furnished, supported by the product record and documentation of the amount used for the wound. Q4181 is an add-on code: bill it only with a primary procedure, and its payment falls within that procedure’s global period. CMS classifies it as technical-component-only; a separate code covers interpretation. The documentation should identify the product and support the quantity reported, while the primary procedure documentation supports the associated wound service.
This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.
Where Q4181 pays more and less in Washington
| Payment locality | Office | Facility |
|---|---|---|
| Rest Of Washington | $134.00 | Unavailable |
| Seattle (King Cnty) | $156.14 | Unavailable |
How the Q4181 rate is calculated
Each of Q4181’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.
How the rate is built · Q4181
RVUs × geographic indexes × conversion factor
Work0.00
0.00 RVUs× 1.000 GPCI
Practice expense3.81
3.81 RVUs× 1.000 GPCI
Malpractice0.00
0.00 RVUs× 1.000 GPCI
Adjusted RVUs
3.8100
Conversion factor
$33.4009
Medicare rate
$127.26
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for Q4181
The CMS indicators that decide how Q4181 is paid alongside other services.
CMS payment indicators · Q4181
Wound product
| Rule | CMS value | What it means |
|---|---|---|
| Global period | ZZZ | Add-on code: falls within the primary procedure’s global period. |
| Multiple procedures | 0 | No multiple-procedure reduction. |
| Bilateral (modifier 50) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 0 | Not paid without supporting documentation. |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 3 | Technical component only. |
Q4181 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- Q4186EpiFix material
- Q4186 identifies EpiFix, while Q4181 identifies Amnio Wound. Select the code for the product furnished rather than choosing by wound size alone.
- Q4187Wound product
- Q4187 identifies Epicord; Q4181 identifies Amnio Wound. The product identity determines which HCPCS code to report.
- Q4177Floweramnioflo, 0.1 cc
- Q4177 identifies Floweramnioflo and uses a volume unit. Q4181 identifies Amnio Wound and is measured per square centimeter.
Q4181 billing questions
How is the number of units determined?
Use the square-centimeter quantity of Amnio Wound furnished, with the product record and wound documentation supporting the units reported.
Can Q4181 be billed by itself?
No. CMS identifies it as an add-on code that must be billed with a primary procedure.
Is the product application included in Q4181?
Q4181 identifies the Amnio Wound product quantity. Report the primary procedure for the associated wound service.
What documentation supports this code?
Document that Amnio Wound was furnished, the quantity in square centimeters, and the wound service performed under the primary procedure.
Does Q4181 include interpretation?
No. CMS classifies Q4181 as technical-component-only; a separate code covers interpretation.
Where these rates come from
FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.
CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027
Show the CMS file lines behind this rate
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